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K. Sumada
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Liquid Bio-Silica Fertilizer from Ash Solid Waste of Sugar Industry K. Sumada; L. U. Widodo
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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The liquid bio-silica fertilizer is one of the fertilizer products in liquid phase containing silica (SiO2), potassium (K) and nitrogen (N). This liquid bio-silica fertilizer is highly needed by some plants that accumulate silica such as rice, sugar cane, corn, palm and others. The presence of silica in fertilizers can improve the quality and quantity of crop yields and keep the silica content in the soil. The liquid bio-silicate fertilizer is produced through three stages of the process, the first process of silica extraction in ash solid waste of sugar industry with a solution of potassium hydroxide (KOH 2N) at 100 C for 2 h will form a potassium silicate solution (K2O.SiO2), the second stage of the process is the ion exchange with the cationic resin to decrease the acidity (pH) to produce liquid potassium silicate fertilizer with various pH (acidity degree), and the third stage is mixing process with the addition of urea solution (nitrogen source). The characteristics of the liquid bio-silica fertilizer were determined based on the concentration of silica (SiO2), potassium (K) and nitrogen (N) as well as the degree of acidity (pH). Based on the results of the research, the bio-silica liquid fertilizer plus has pH from 13,5-11 with 3-5% silica content, potassium (5 - 6,0%) and nitrogen (2-3%).
Precipitated Silica by Precipitation Process of The Sodium Silicate Solution with Carbon Dioxide Gas (Co2) on Fixed Bed Column S. Muljani; R. Dewati; Suprihatin; K. Sumada
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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Precipitated silica is a silica product produced by a precipitation process, this silica product contains silica, white color, very porous and nanomaterial. This precipitate silica is required to support various types of industrial operations such as vehicle, rubber, cosmetics, electronics, agriculture and other industries. The precipitated silica is produced through two stages of the process: firstly is silica extraction process with the base solution and the secondly is precipitation processes of silica solution with various types of acids such as hydrochloric acid (HCl), sulfuric acid (H2SO4), acetic acid (CH3COOH) and other acids. In this study, the source of silica was obtained from bagasse ash waste of sugar industry, the base solution as a solvent was sodium hydroxide (NaOH) 2 N and the precipitate process was carried out by using carbon dioxide gas (CO2) and the precipitation process was carried out on a fixed bed column. In this study we studied the effect of silica concentration on the inlet feed and the high of the fixed bed on the quality of the precipitated silica product. Based on the results of this study, the quality of precipitated silica produced as follows: 95-98% silica content, weight loss due to temperature heating 105 C: 4 – 5 %, acidity (pH of slurry 5%) : 6.8-7,1, and surface area (BET): 175 m2/gram. The best conditions in this study were 30 cm high of fixed bed, and concentration of silica feed: 0,33% weight and acidity (pH) precipitation 7,1.
Implementation of Freundlich Equation Absorption of Calcium and Magnesium Ions on Saturated Salt Solution C. Pujiastuti; K. Sumada; Y. Ngatilah; D. I. Putri; N. N. W. Triana
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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Traditional salt contains NaCl between 80-92% and the other is impurity such as magnesium (Mg), calcium (Ca), potassium (K) and sulfate (SO4) ions., The NaCl content of salt is under government regulations, namely NaCl 94.7% for consumption salt and NaCl above 98% for industrial salt. Improved salt quality is done through increasing NaCl concentration or decreasing concentration of impurities. In this research, salt quality improvement was carried out by reducing the concentration of impurities through ion exchange methods. The ion exchange method is carried out by using 2 (two) types of resin namely cationic resin and anion. Cationic resin serves to exchange positively charged ions such as Mg2+, Ca2+ and K+ ion and anionic resin for negatively charged ions such as SO42-. The purpose of this study is to obtain Freundlich mathematical equations which can be used to calculate resin requirements. The study was conducted using a stirred tank with a variable amount of cationic resin from 25-150 grams per 1 liter of saturated salt solution and stirring time of 5 - 30 minutes. The saturated salt solution used contains 28.4% NaCl, 0.4% calcium and 0.09% magnesium. The results obtained were 36.99% NaCl, 0.025% Calcium and 0.044% Magnesium, 25 minutes contact time, 100 grams cation resin Freundlich equation obtained Calcium ion: ln (x / m) = 1.087 ln C - 4.2282, R2 = 0. 9544, Magnesium Ion: ln (x / m) = 5.6278
Co-Authors C. Pujiastuti D. I. Putri L. U. Widodo N. N. W. Triana R. Dewati S. Muljani Suprihatin Y. Ngatilah